A production process of gas-fused and continuously drawn quartz rods

Abstract

The invention particularly relates to a production device and process for gas-melting continuous-drawing of a quartz rod, and belongs to the technical field of quartz rod production. The production device comprises a furnace body, a molten pool and a traction machine; the molten pool is arranged in the furnace body; a quartz lamp used for feeding is arranged at the top end of the furnace body, themolten pool is located under the quartz lamp, a blanking port is formed in the bottom of the molten pool, the traction machine is located below the furnace body, a guide rod is arranged on the traction machine, and the guide rod moves upwards to the blanking port and is in butt joint with the blanking port. One-step drawing of the quartz rod is realized, the production period is shortened, the temperature change can be controlled within a reasonable range through a combustion control device, the energy consumption of repeated heating is reduced, the yield of the molten drawn quartz rod is improved, and the cost is saved; and direct heating of the molten pool for melting quartz sand is avoided, and the service life of the molten pool is prolonged.

Description

technical field [0001] The invention belongs to the technical field of quartz rod production, in particular to a production process of gas melting and continuous drawing quartz rods. Background technique [0002] At present, the gas refining quartz glass process is to melt quartz sand with hydrogen-oxygen flame to make a quartz ingot with a diameter of 250-1000 mm. The main method is to heat the quartz sand at high temperature to turn the quartz sand into molten quartz glass and cool After that, a quartz ingot is formed. The diameter of the quartz rod used in the optical fiber manufacturing industry is mainly 10-100mm, so it is necessary to heat and melt the quartz ingot to prepare the quartz rod. This process has the following problems: 1. Two processes are required to realize the production of quartz rods, and the cycle is long; 2. The melting and drawing process requires a large amount of electricity and graphite consumables, and the cost is high; 3. Production discontin...

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Problems solved by technology

This process has the following problems: 1. Two processes are required to realize the production of quartz rods, and the cycle is long; 2. The melting and drawing process requires a large amount of electricity and graphite consumables, and the cost is high; 3. Production discontinuity , and cause a lot of waste of quartz products, because after each melting and drawing, the fused silica glass in the graphite crucible remains, and the yield is only 40%-65%

[0003] According to the Chinese classification number: TK175, document code: A, article number: 1001-5523 ​​(2017) 06-0032-05, the temperature at which quartz sand reaches a molten state is about 1725°C. , the viscosity of quartz glass in the molten state is too high, which will lead to poor discharge and affect the drawing of quartz rods; when the temperature is too high, it will also affect the drawing of quartz rods

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